Do a search in Stovebolt for people complaining about fit and applicability of repops. To think that the suppliers could have enough similarity (interchangable/replaceable) to match each other AND the old style is just this side of impossible. I was reading just a day or so ago about all of the different windshield wiper arms that are supposedly for a given year model. It is enough to make your head swim.
I can't see there being an "AD in a box" that goes together and is accurate without significant crafting by the guy putting it together.
...which is good news for us folks who own the real thing.
(Old Chevy Truck Guy: don't think it is the engineering team solely responsible for what gets to the showroom. Just look at concept vehicles and their production counterparts. Financial guys are involved too.)